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Ivanshal [37]
3 years ago
5

I need help is it A B C or D

Mathematics
1 answer:
vivado [14]3 years ago
5 0
Let maria drive for x hours, then 

<span>51x + 53(5-x) = 258 </span>
<span>265 - 2x = 258 </span>
<span>2x = 7 </span>
<span>x = 3.5 hours </span>
<span>-------------------</span>
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A researcher is interested in estimating the mean weight of a semi tracker truck to determine the potential load capacity. She t
FinnZ [79.3K]

Answer:

(19229.11 ,20770.89)

Step-by-step explanation:

We are given the following information:

Sample size, n = 17

Sample mean = 20,000 pounds

Sample standard deviation = 1,500 pounds

Confidence level = 95%

Significance level = 5% = 0.05

95% Confidence interval:  

\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}  

Putting the values, we get,  

t_{critical}\text{ at degree of freedom 16 and}~\alpha_{0.05} = \pm 2.119  

20000 \pm 2.119(\displaystyle\frac{1500}{\sqrt{17}} ) = 20000 \pm 770.89 = (19229.11 ,20770.89)  

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4 years ago
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2 years ago
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data was collected at a tennis court. it showed that being older implies that a player will stay for a shorter length of time. w
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Answer:

There is a correlation between age and length of stay. There may or may not be causation. Further studies would have to be done to determine this.

Step-by-step explanation:

The answer was checked

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4 years ago
Which set of ordered pairs does not represent a function? A. (7, 8), (-4, 4), (3, 8), (-7, -1) B.(-5, -3), (-1, -8), (-7, 0), (-
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Step-by-step explanation: 5

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Juan lives 100 m away from billy. what is juans average speed if he reaches billys home in 50 seconds
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